Flour source: Indian grocery stores.
If your local "regular" grocery in North America is out of wheat flour, check your local Indian Grocery.
Panic buying of flour has probably hit them too. BUT... they have different sources and different distribution channels than the standard Kroger, Publix, Albertson's etc.
Soooo... they "might" be able to restock quicker.
Just an idea to check out, if you need flour, white rice, etc.